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Hair setting compositions based on t-butyl acrylate and hydroxyalkyl methacrylate

a technology of hydroxyalkyl methacrylate and tbutyl acrylate, which is applied in the direction of hair cosmetics, make-up, pharmaceutical delivery mechanisms, etc., can solve the problems of not having the required mechanical quality, affecting the effect of hair color, and affecting the appearance of the hair

Inactive Publication Date: 2013-09-12
BASF AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes a new type of cosmetics that contain a special copolymer, a carrier, and other ingredients like viscosity modifiers, hairstyling products, and protective agents. The cosmetics can be in the form of skincare products, haircare products, or hair-setting products. They can also be in the form of pump sprays or aerosol sprays. The special copolymer helps improve the effectiveness and texture of the cosmetics.

Problems solved by technology

However, this replacement of the organic solvents has a number of problems.
Thus, formulations of the film-forming polymers known from the prior art which satisfy the corresponding VOC regulations are not, for example, sprayable, or are only sprayable following further dilution, and are thus only of limited suitability for use in hairsprays.
Polymer films which are formed from such preparations sometimes do not have the required mechanical quality and thus have inadequate setting action and poor hold for the hair.

Method used

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  • Hair setting compositions based on t-butyl acrylate and hydroxyalkyl methacrylate
  • Hair setting compositions based on t-butyl acrylate and hydroxyalkyl methacrylate
  • Hair setting compositions based on t-butyl acrylate and hydroxyalkyl methacrylate

Examples

Experimental program
Comparison scheme
Effect test

example 1

tert-butyl acrylate / methacrylic acid 75 / 25 w / w (comparative example)

[0440]In a 2 l polymerization vessel with stirrer and heating and cooling devices, at a temperature from 20 to 25° C.

250 g of deionized water0.6 gof a 15% strength by weight aqueous solution ofsodium lauryl sulfate in deionized water 35 gof feed II (see below)

were initially introduced and heated to 45° C. with stirring and under a nitrogen atmosphere. After the temperature had been reached, feed I (see below) was added over the course of 5 minutes.

[0441]The mixture was then heated to 80° C. and, while stirring and maintaining the reaction temperature, the remainder of feed II was metered in over the course of 2.5 hours with constant feed streams.

[0442]When the feeds were complete, the reaction mixture was stirred for a further hour at 80° C. and then cooled to 60° C.

[0443]While maintaining the temperature of 60°, feed III (see below) was added. The mixture was then cooled to 35° C. and, while maintaining the reactio...

example 8

Preparation of Polymer 8 (Solution Polymerization in Ethanol)

[0450]The following feeds were prepared at 20° C. with stirring:

Feed 1:  123 g t-BA55 gt-BMA41 gHEMA15 gMAA 5 gAA200 g EthanolFeed 2:   7 gWako V 5950 gEthanol

[0451]At 20° C., a mixture of 300 g of ethanol, 15% of the total amount of feed 1, and 15% of the total amount of feed 2 were prepared. The mixture was heated to 78° C. under atmospheric pressure. After 78° C. had been reached, feed 1 and feed 2 were started at the same time. Feed 1 was metered in over the course of 3 h, and feed 2 was metered in over the course of 4 h with a constant feed stream. The reaction mixture was maintained at 78° C. throughout the entire feed. When feed 2 was complete, the reaction mixture was kept at 78° C. for a further 2 h, then cooled to room temperature.

example 9

Preparation of Polymer 9 (Solution Polymerization in Ethanol / Water with Water-Soluble Starters)

[0452]The following feeds were prepared at 20° C. with stirring:

Feed 1:  90 gMMA 30 gHEMA 30 gMAA200 gEthanolFeed 2:  3 gSodium peroxodisulfate135 gEthanol102 gWater

[0453]At 20° C., a mixture of 60 g of ethanol, 45 g of water, 15% of the total amount of feed 1, and 15% of the total amount of feed 2 were prepared. The mixture was heated to 78° C. under atmospheric pressure. After 78° C. had been reached, feed 1 and feed 2 were started at the same time. Feed 1 was metered in over the course of 3 h and feed 2 was metered in over the course of 4 h with a constant feed stream. The reaction mixture was maintained at 78° C. throughout the entire feed. When feed 2 was complete, the reaction mixture was maintained at 78° C. for a further 2 h, then cooled to room temperature.

[0454]Details of the monomer composition in percent by weight,

Polymer fromexamplet-BAt-BMAHEMAHPMAMAAothers1 (comparative7525e...

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Abstract

The present invention relates to copolymers, which comprises, in copolymerized form, between 25 and 80% by weight of tert-butyl(meth)acrylate, 2 to 60% by weight of hydroxyalkyl(meth)acrylate, 10 to 40% by weight of an anionic or anionogenic, free-radically polymerizable, olefinically unsaturated compound which is or comprises methacrylic acid, and, if appropriate, up to 30% by weight of a further free-radically polymerizable, olefinically unsaturated compound. In addition, the present invention relates to the use of such copolymers in cosmetic preparations, and to such cosmetic preparations per se.

Description

[0001]The present invention relates to copolymers which comprises, in copolymerized form, between 25 and 80% by weight of tert-butyl(meth)acrylate, 2 to 60% by weight of hydroxyalkyl(meth)acrylate, 10 to 40% by weight of an anionic or anionogenic, free-radically polymerizable, olefinically unsaturated compound which is or comprises methacrylic acid, and, if appropriate, up to 30% by weight of a further free-radically polymerizable, olefinically unsaturated compound. In addition, the present invention relates to the use of such copolymers in cosmetic preparations, and also to such cosmetic preparations per se.PRIOR ART[0002]Stricter environmental regulations and a growing ecological awareness increasingly demand ever lower fractions of volatile organic components (VOCs) in cosmetic aerosol preparations such as, for example, aerosol hairsprays.[0003]The VOC content in hairsprays is essentially determined by the nonaqueous solvents and the propellants. For this reason, instead of nonaq...

Claims

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Application Information

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IPC IPC(8): A61K8/81A61Q5/12A61Q1/00A61Q5/06A61K8/04
CPCA61K8/042A61K8/046A61K8/06A61K8/062A61K8/8152A61Q1/02A61Q1/00A61Q5/06A61Q5/12C08F220/06C08F220/18C08F220/28A61Q5/02C08F220/20C08F220/1804
Inventor WINTER, GABILAUBENDER, MATTHIAS
Owner BASF AG
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